could sneak
Verbo irregular: sneak - sneaked, snuck- snuck

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sneak
you could sneak
he could sneak
we could sneak
you could sneak
they could sneak 	I could be sneaking
you could be sneaking
he could be sneaking
we could be sneaking
you could be sneaking
they could be sneaking	I could have snuck
you could have snuck
he could have snuck
we could have snuck
you could have snuck
they could have snuck	I could have been sneaking
you could have been sneaking
he could have been sneaking
we could have been sneaking
you could have been sneaking
they could have been sneaking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sneak
you could not sneak
he could not sneak
we could not sneak
you could not sneak
they could not sneak 	I could not be sneaking
you could not be sneaking
he could not be sneaking
we could not be sneaking
you could not be sneaking
they could not be sneaking	I could not have snuck
you could not have snuck
he could not have snuck
we could not have snuck
you could not have snuck
they could not have snuck	I could not have been sneaking
you could not have been sneaking
he could not have been sneaking
we could not have been sneaking
you could not have been sneaking
they could not have been sneaking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sneak?
could you sneak?
could he sneak?
could we sneak?
could you sneak?
could they sneak? 	could I be sneaking?
could you be sneaking?
could he be sneaking?
could we be sneaking?
could you be sneaking?
could they be sneaking? 	could I have snuck?
could you have snuck?
could he have snuck?
could we have snuck?
could you have snuck?
could they have snuck? 	could I have been sneaking?
could you have been sneaking?
could he have been sneaking?
could we have been sneaking?
could you have been sneaking?
could they have been sneaking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sneak?
could you not sneak?
could he not sneak?
could we not sneak?
could you not sneak?
could they not sneak? 	could I not be sneaking?
could you not be sneaking?
could he not be sneaking?
could we not be sneaking?
could you not be sneaking?
could they not be sneaking? 	could I not have snuck?
could you not have snuck?
could he not have snuck?
could we not have snuck?
could you not have snuck?
could they not have snuck? 	could I not have been sneaking?
could you not have been sneaking?
could he not have been sneaking?
could we not have been sneaking?
could you not have been sneaking?
could they not have been sneaking?